X-ray imaging with PbI2-based a-Si : H flat panel detectors

In this paper, we discuss a new X-ray imaging detector which consists of le ad iodide polycrystalline films as sensor and amorphous silicon flat panel arrays as read out. We present our investigation of such a detector in 5 cm x 5 cm format with 100 mum pixels. The signal amplitude, and sensitivity o f the films have been measured along with spatial resolution properties suc h as line spread function (LSF) and modulation transfer function (MTF). Rea l-time imaging performance at 30 frames/s of lead iodide films has also bee n evaluated using vidicon tube approach. Important properties of lead iodid e film are also discussed. Finally, the potential applications of this dete ctor are analyzed. (C) 2001 Published by Elsevier Science B.V.